I set mine up to carry about that load when we are traveling. I use 10 psi. I set it and forget it though. I put 10psi in it before we went to Daytona. I hadn't checked them since. I checked them yesterday, it was still the same.
I had mine at 18, but the wife said she didn't like the ride. I pumped it up to 25 and she said it is much better. I weigh 195, she weighs[sm=icon_quiet.gif][sm=escape.gif]